Yeah, a few options, most best with a second person:
-heat as mentioned
-heat it and/or air hammer the bearing/knuckle interface while someone preloads the steering (do short increments so you don't burn up your pump)
-heat it and "bump" the steering to push it out

Spray liberally with penetrating oil of your choice -- I've been liking Justice Brothers JB80 but of course there's Kroil, PB etc

As to the original question of the thread, I'd personally try to avoid cutting the knuckles at all costs. But I wonder if a 6" cut-off wheel would get in enough to lop the BJ studs between knuckle and inner C?

Don't vanish OP! Curious as to final resolution

 

I usually use a chisel and a bfh works everytime!

 

Loosen the bolts slightly and find some pot holes or a curb to drive over. You could use a gear puller if the yoke bottoms out against the axle tube. Cut a groove with a cut off wheel on the back of the mounting surface so you can get a chisel started. Make sure you antiseize the new ones.

 

If it isn't crazy cold out this weekend, I'm going to try again but I was considering cutting or torching the BJs if all else fails. I want my truck back. lol

 

**** the next guy. No anti-sieze! lol

 

The fanatic is correct, BFH and chisel work rather well. I wouldn't want to go after balljoints, or anything else for that matter, with a cutting wheel/torch..... Knuckles ain't cheap, and finding the right ones can be fun.

Now that's not nice. But, it DID make me laugh.

 

I once knew a guy who before he went in for an oil change put red thread locker on his oil filter

 

That's just cold.

 

I've used the power steering linkage method to pop out my hubs that don't want to come out using normal methods. Works pretty good. Just use the steering linkage and socket/extension.

 

In a way he was teaching young kids problem solving skills